I'm not sure I understand what you're asking, but I'll try to answer you anyway!
A standard DVD has a maximum capacity of 4.7GB. This is immutable. There is another type of DVD which can hold 8.54GB. These are called "Dual-Layer
" DVD's. Most movies that come out on DVD are in fact dual-layer DVDs. Dual-Layer DVD's work in most modern DVD drives (though some older, cheaper drives may have trouble reading them.)
I hope that answers your question.